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Expanded-Range Venturi Flow Meter: Development And Testing Of A 3d-Printed Flow Meter And Solid-State Valve Concept, Joseph M. Pomo
Expanded-Range Venturi Flow Meter: Development And Testing Of A 3d-Printed Flow Meter And Solid-State Valve Concept, Joseph M. Pomo
Mechanical Engineering ETDs
In this thesis, I document the design, testing and performance of a novel Expanded-Range Venturi Flow Meter (ERVFM) concept. The ERVFM combines two, parallel-configured Venturi Flow Meters (VFM) with a Solid-State Selector Valve (SSSV). The goal was to create a reliable, high-turndown ratio flow meter which directs the fluid to either Venturi tube using the inherent pressure drop of the SSSV, and without moving parts. I constructed a pumped-fluid loop test-setup and quantified the ERVFM’s performance through pressure loss and mass flow rate measurements. In addition, I used python to develop models to assist in prototype design and data-processing. My …
Printing Parameter Determination And Characterization Of Additively Manufactured Kovar Steel, Will Macgreggor Davidson
Printing Parameter Determination And Characterization Of Additively Manufactured Kovar Steel, Will Macgreggor Davidson
Mechanical Engineering ETDs
Kovar (ASTM F15, UNS K94610) steel has many applications across Sandia National Laboratories but is best known within academia and industry for its glass-to-metal and glass-to-ceramic hermetic sealing capabilities. Successful printing parameters for a Renishaw AM400 to additively manufacture artifacts from Kovar steel powder have been determined. The printed test artifacts have been studied for ultimate tensile strength, density, surface roughness, hardness, bulk composition, and impact toughness. Longer throughput measurements such as porosity, coefficient of thermal expansion, and grain structure studies have been established for future delivery to the research team. Yet another delivery from this thesis research is a …
High-Throughput Tensile Testing Reveals Stochastic Properties In Additively Manufactured Steel, Bradley C. Salzbrenner
High-Throughput Tensile Testing Reveals Stochastic Properties In Additively Manufactured Steel, Bradley C. Salzbrenner
Mechanical Engineering ETDs
An adage within the Additive Manufacturing (AM) community is that “complexity is free”. Complicated geometric features that normally drive manufacturing cost and limit design options are not typically problematic in AM. While geometric complexity is usually viewed from the perspective of part design, this advantage of AM also opens up new options in rapid, efficient material property evaluation and qualification. This Thesis demonstrates how 100’s of miniature tensile bars can be produced and tested for comparable cost and in comparable time to a few conventional tensile bars. With this technique, it is possible to evaluate the stochastic nature of mechanical …